Wavelength Division-adaptive Interference Cancellation Applied in OFDM Visible Light Communication Systems

作者：Yi Ying^*; Li Changping; Lee Kyesan

来源：IETE Journal of Research, 2012, 58(5): 390-397.

DOI：10.4103/0377-2063.104157

• CPE
• Doppler shift
• Frequency offset
• Inter-carrier interference
• Orthogonal frequency division multiplexing

This paper studies the performance degradation caused by optical Doppler shift in light-emitting diode-based visible light communication systems, which integrate orthogonal frequency division multiplexing (OFDM). Through theoretical analysis and computer simulations, we can observe that frequency offset plays a significant role in the OFDM performance deterioration due to inter-carrier interference (ICI) and common phase error (CPE). Therefore, a scheme to correct the frequency offset by using wavelength division-adaptive interference cancellation (WD-AIC) was proposed. The main approach is to assign an estimated sub-carrier after every two adjacent sub-carriers to reduce the negative effects of both ICI and CPE. Finally, the simulation results declare that our proposed WD-AIC is indeed effective against the high degree of frequency offset.

• 出版日期2012-10